Embora pareça ser uma resolução diferente, ela ainda pode resolver seu problema.
Recovering the BIOS using key press combination
When you upgrade the BIOS on your notebook, a copy of the previous BIOS version is stored in the HP TOOLS partition of your hard drive. Many HP notebook computers have an emergency BIOS recovery feature that allows you to recover and install the last known good version of the BIOS from the hard drive, as long as the hard drive remains functional. This emergency recovery feature is separate from the BIOS and is designed to work in the event of a catastrophic BIOS failure.
To recover an earlier version of the BIOS on your notebook:
Turn off the computer.
Plug the notebook into power using the power adapter.
Press and hold the Windows key and the B key down at the same time while the computer is off.
Still pressing those keys, press and hold down the Power button on the notebook for 1 second, and then release the Power button and the Windows and B keys.
The Power LED light remains on, and the screen remains blank for about 40 seconds before anything appears on the display. You might also hear beeping sounds. Eventually, an HP BIOS Update screen displays and the BIOS update begins automatically.
OR
To recover the BIOS on your notebook using the USB key:
Plug the notebook into an AC adapter.
Insert the USB key with HP_Tools installed into an available USB port.
Press the Power button while holding the Windows key and the B key.
The emergency recovery feature replaces the BIOS with the version on the USB key. The computer reboots automatically when the process is completed successfully.
Por favor, note que o link abaixo (a fonte) também dá muito mais detalhes, incluindo o que acontece se o acima não funcionar!
link